Summary
Replacement of the west aeration blower header piping at the long creek wastewater treatment plant. 1. Install erosion control devices 2. Construct replacement header and supports to the maximum extent possible without impacting the existing aeration system. 3. Excavate and expose existing pipe. Identify tie-in location. 4. Prepare for night shutdown. 5. Demolish existing blower discharge piping to the vertical pipe sections on the out of service blower(s) in the blower building. Keep vertical pipe in place. Keep discharge piping for in service blower(s) in place. Tie-in new header to out of service blower(s) in the blower building. 7. Shutdown the active blowers for yard tie-in connection. 8. Cut and remove existing pipe at yard tie-in. Install coupling and dip bend and connect with above grade header. Simultaneously, demolish existing blower discharge piping to the vertical pipe sections on the remaining blower(s). Make connections from remaining blower(s) to new header in the blower building. Aeration shutdown shall be minimized. Pour flowable fill through existing upstream-most blower discharge pipe to completely fill existing discharge header noted on the drawings for abandonment. Flowable fill shall be visually present in all existing blower discharge pipes to confirm the piping has been filled with flowable fill. Demolish the remainder of the existing blower discharge pipes to 6-inches below the floor slab of the blower building. Complete remaining civil construction, site restoration, and remove erosion control devices.